Make your own free website on Tripod.com
 SPECIFICATION OF ACETIC ANHYDRIDE 

 

CHARACTERISTICS ISI SPECIFICATIONS
IS: 1235-1988
DACL SPECFICATION
Acetic anhydride content
percent by mass, min.
98 98
Reducing substance
percent by mass, max.
0.015 0.015
Iron, Percent by mass, max. 0.0005 0.0005
Sulphates, percent by mass, max 0.003 0.003
Chlorides, percent by mass, max 0.001 0.001
Non-volatile residue,
percent by mass, max
0.01 0.01
Insoluble matter To pass the test To pass the test
Colour (Hazen) max. 20.00 20.00
Ash, percent by mass, max. 0.02 0.02
Distillation Range Difference between initial boiling point and Dry Point shall not exceed 4.0 D.C. incl. 139.5 D.C.(temp. being corrected for 760 mm Hg pressure) Difference between initial boiling point and Dry Point shall not exceed 4.0 D.C. incl. 139.5 D.C.(temp. being corrected for 760 mm Hg pressure)
Reducing Substance Test - 2 Minutes

 

CAS # 108 - 24 - 7
Molecular Formula (CH3 CO)2 O
Appearance Clear liquid, free from suspended matter, with a pungent odure.
Excise Tariff Registration # 2915-20
Harmonised Code 2915.24
Packing 200 Kg. barrels or 10 M.T. Tanker Loads.

 APPLICATIONS 

Acetic anhydride (CH2CO2)O (often abbreviated AC2O), is a mobile colorless liquid with a penetrating, choking odor, closely related to acetic acid. It is used in industry for acetylation rections and as a solvent in laboratory applications. The greatest single application is in the manufacture of cellulose esters, chiefly cellulose acetate. It is also used in starch acetylation to make textile sizing agents, in slicylic acid acetylation to aspirin, and in electrolytic polishing of metals, especially aluminium, and semiconductor processing. An undetermined quantity goes into the manufacture of chloroacetic acid and acetyl chloride. It is peculiarly useful for oxidation reactions, not only of metals but also for organic compounds.

 HAZARDOUS DATA 

Acetic anhydride has a powerful effect on the human body. The odor threshold is 0.49 mg/m3, and the eyes are effected by as little as 0.36 mg/m3. Concentrations> 0.03 mg/m3 throughout a regular workday are inadvisable. Acetic anhydride penetrates the skin quickly and can form painful burns and blisters that are slow to heal. It is particularly dangerous to the tissues of the eyes, nose and mouth, rubber gloves, masks, and goggles are recommended.


Home